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Complete extinction dacron pre-orientated yarns and preparation method thereof

A technology of fully matte polyester and pre-oriented yarn, applied in the field of modified polyester, can solve the problems of limiting PET recycling, unable to achieve rapid PET degradation, long natural degradation time, etc., to improve dyeing performance and natural degradation efficiency, easy to use. Degradation and recycling, the effect of high natural degradation efficiency

Active Publication Date: 2019-05-10
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although landfill and incineration are simple and quick, they will cause certain pollution to the environment
Recycling PET waste after degradation is the most scientific way to deal with PET waste, but the proportion of recycling is still very small at present. This is because most of the clothing is made of cotton polyester or wool polyester blends. On the one hand, it requires a large labor cost. Polyester fibers are separated. On the other hand, PET has a dense structure and high crystallinity, and its natural degradation time is long, which is time-consuming and labor-intensive.
At present, the mainstream PET degradation methods include hydrolysis, alcoholysis, ammonolysis, aminolysis and pyrolysis, etc., but due to the special structure of PET, its processing efficiency is low, and the rapid degradation of PET cannot be achieved, which greatly limits the recovery of PET. use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Complete extinction dacron pre-orientated yarns and preparation method thereof
  • Complete extinction dacron pre-orientated yarns and preparation method thereof
  • Complete extinction dacron pre-orientated yarns and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] A kind of preparation method of full-dull polyester pre-oriented yarn, the steps are as follows:

[0086] (1) prepare modified polyester;

[0087] (1.1) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0088] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1:1:1.2:2.0, and place in an ice bath Under the conditions of reaction for 2h, cooling crystallization, centrifugation, washing, refining and drying are carried out after the reaction to obtain octyne diol;

[0089] (b) Mix octynediol, ethanol and palladium catalyst in a weight ratio of 2:10:0.01, react at a temperature of 40°C for 50 minutes, continuously feed hydrogen during the reaction, and separate and purify after the reaction to obtain 2,5,6,6-tetramethyl-2,5-heptanediol, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in formula (I);

[0090] (1.2) Preparation of heterogeneous solid acid-base SiO 2 -Al 2 o 3 ;

[0...

Embodiment 2

[0110] A kind of preparation method of full-dull polyester pre-oriented yarn, the steps are as follows:

[0111] (1) prepare modified polyester;

[0112] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid;

[0113] First, mix tungstic acid and hydrogen peroxide, stir at room temperature for 10 minutes, then add 2-tert-butylcyclohexanol and react at 80°C for 1 hour, then raise the temperature to 94°C for 2 hours. During the reaction, the reactants are always It is in a reflux state, and finally undergoes cooling crystallization, washing and refining, wherein at the beginning of the reaction, the molar ratio of tungstic acid, 2-tert-butylcyclohexanol and hydrogen peroxide is 1:35:120;

[0114] (1.2) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0115] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.1:1:1.2:2.3, and place in an ice bath Under the conditions of reaction for 2h, cooling crystalliz...

Embodiment 3

[0130] A kind of preparation method of full-dull polyester pre-oriented yarn, the steps are as follows:

[0131] (1) prepare modified polyester;

[0132] (1.1) Preparation of 2-tert-butyl-1,6-hexanedicarboxylic acid: firstly mix tungstic acid and hydrogen peroxide, stir at room temperature for 12 minutes, then add 2-tert-butylcyclohexanol and firstly mix at 83°C React for 1.5 hours, then raise the temperature to 90°C and react for 2 hours. During the reaction, the reactants are always in a reflux state, and finally carry out cooling crystallization, washing and refining. The molar ratio is 1:33:120;

[0133] (1.2) Preparation of 2,5,6,6-tetramethyl-2,5-heptanediol;

[0134] (a) Mix KOH powder, 3-methyl-3-hydroxybutyne, 3,3-dimethyl-2-butanone and isopropyl ether at a molar ratio of 1.2:1:1.25:2.0, and place in an ice bath Under the conditions of reaction for 3 hours, after the reaction is completed, cooling and crystallization, centrifugation, washing, refining and drying a...

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Abstract

The invention relates to complete extinction dacron pre-orientated yarns and a preparation method thereof. The preparation method comprises the following step: preparing modified polyester POY yarns from a modified polyester melt according to a POY process to obtain the complete extinction dacron pre-orientated yarns; the preparation method of the modified polyester comprises the following steps:uniformly mixing terephthalic acid, ethylene glycol, 2,5,6,6-tetramethyl-2,5-heptandiol, fluorine-containing binary acid with a tertiary butyl side group, an extinction agent, dihydric alcohol with silicon on main chain, an extinction agent and multiphase solid acid-base powder roasted at a high temperature; and successively carrying out esterification reaction and polycondensation, wherein the multiphase solid acid-base is SiO2-Al2O3 and / or SiO2-MgO. The dye-uptake of a prepared product is 88.3-91.7% at a temperature of 125 DEG C, and the intrinsic viscosity of the product placed for 60 months at a temperature of 25 DEG C and relatively humidity of 65% is reduced by 16-20%. The preparation method is simple in process. The prepared product is good in dyeing performance and natural degrading performance.

Description

technical field [0001] The invention belongs to the technical field of modified polyester, and relates to a pre-oriented full-dull polyester yarn and a preparation method thereof. Background technique [0002] Polyethylene terephthalate fiber (PET fiber or polyester fiber) has a series of high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance. Excellent performance, and its fabric has the advantages of good wrinkle resistance and crispness, and is widely used in clothing, home textiles and other fields. At this stage, polyester fiber matting products mainly include bright, semi-dull and full-dull products. TiO 2 Applied in textiles, it can have the advantages of antistatic, anti-ultraviolet, antibacterial, extinction, infrared absorption, anti-aging and self-cleaning. Fiber grade titanium dioxide is a white powder, which is insoluble in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D01F6/92D01F1/10C08G63/86C08G63/695
Inventor 王丽丽马文平汤方明
Owner JIANGSU HENGLI CHEM FIBER
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